I just bought a cheap pair of dive boots (they were like $10 on clearance). You can even just get the socks as long as they have a grip on the bottom. The ray guards are really nice insurance, but I haven't used them in a long time. if you shuffle your feet as you move you typically don't have any problems. That being said there are plenty of people out there that have been hit by rays and my day might be right around the corner...
“There are two spiritual dangers in not owning a farm. One is the danger of supposing that breakfast comes from the grocery, and the other that heat comes from the furnace.”